| Author: |
Carlos J. Quintero (Microsoft MVP) |
Applies to: |
Microsoft Visual Studio 2005 |
| Date: |
July 2009 |
|
Microsoft Visual Studio 2008 |
Introduction
When you have a C# event with add/remove methods and you use the file code model
to get the parameters of methods, the EnvDTE.CodeFunction.Parameters call causes
a COM exception.
More Information
Steps to reproduce the problem:
- Create a class with this code:
| Language: C# |  Copy Code (IE only) |
namespace ClassLibrary1
{
public class Class1
{
public event System.EventHandler Event1
{
add
{
}
remove
{
}
}
}
}
- Create and execute this macro:
| Language: VB.NET | Copy Code (IE only) |
Sub Macro1()
Try
ShowParametersCodeElements(DTE.ActiveDocument.ProjectItem.FileCodeModel.CodeElements)
Catch ex As System.Exception
MessageBox.Show(ex.ToString)
End Try
End Sub
Sub ShowParametersCodeElements(ByVal codeElements As EnvDTE.CodeElements)
Dim codeEvent As EnvDTE80.CodeEvent
Dim codeFunction As EnvDTE.CodeFunction
For Each codeElement As EnvDTE.CodeElement In codeElements
If TypeOf codeElement Is EnvDTE.CodeNamespace Then
ShowParametersCodeElements(DirectCast(codeElement, CodeNamespace).Members)
ElseIf TypeOf codeElement Is EnvDTE.CodeType Then
ShowParametersCodeElements(DirectCast(codeElement, EnvDTE.CodeType).Members)
ElseIf TypeOf codeElement Is EnvDTE80.CodeEvent Then
codeEvent = DirectCast(codeElement, EnvDTE80.CodeEvent)
codeFunction = codeEvent.Adder
If Not (codeFunction Is Nothing) Then
MessageBox.Show(codeFunction.FullName & ".add: " & codeFunction.Parameters.Count.ToString & " parameters")
End If
codeFunction = codeEvent.Remover
If Not (codeFunction Is Nothing) Then
MessageBox.Show(codeFunction.FullName & ".remove: " & codeFunction.Parameters.Count.ToString & " parameters")
End If
End If
Next
End Sub
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